Homocrinus-Anastrophia (Savageina) Assoc., Waldron Shale: Wenlock, Indiana

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Anthozoa
Anthozoa indet. Ehrenberg 1834
unclassified
Bryozoa indet. Ehrenberg 1831
Rhynchonellata - Athyridida - Meristellidae
Whitfieldella nitida (Hall 1843)
Rhynchonellata - Pentamerida - Parastrophinidae
Anastrophia (Savageina) internascens
Rhynchonellata - Spiriferida - Cyrtiidae
Eospirifer radiatus (Sowerby 1834)
Rhynchonellata - Rhynchonellida - Eatoniidae
Diabolirhynchia acinus
Rhynchonellata - Rhynchonellida - Rhynchotrematidae
Stegerhynchus spp. (Foerste 1909)
Rhynchonellata - Atrypida - Atrypidae
Atrypa "reticularis (Linnaeus 1758)
Ostracoda
Ostracoda indet. Latreille 1802
Trilobita
Trilobita indet. Walch 1771
Crinoidea - Monobathrida - Hirneacrinidae
Hirneacrinidae indet. Frest and Strimple 1977
Crinoidea - Monobathrida - Patelliocrinidae
Macrostylocrinus sp.
Crinoidea
Disparida indet. (Moore and Laudon 1943)
new genus of Sevastopulo and Lane (1981)
Crinoidea - Homocrinida - Homocrinidae
Homocrinus sp. n. sp. Hall 1852
Crinoidea
Passalocrinus sp.
Crinoidea - Cyathocrinida - Codiacrinidae
Amphipsalidocrinus sp. Weller 1930
Rhombifera - Callocystitidae
? Callocystites sp. Hall 1852
"callocystitid cystoid (probably Callocystites sp.)"
Conodonta
Conodonta indet. Pander 1856
Foraminiferida
Foraminiferida indet. (Eichwald 1830)
arenacous forms
see common names

Geography
Country:United States State/province:Indiana
Coordinates: 39.5° North, 85.7° West (view map)
Paleocoordinates:27.5° South, 51.7° West
Basis of coordinate:based on political unit
Geographic resolution:local area
Time
Period: Silurian Epoch: Wenlock
10 m.y. bin: Silurian 2
*Epoch:Middle Wenlock
Key time interval: Wenlock
Age range of interval: 433.4 - 427.4 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Waldron Shale
Stratigraphic resolution:formation
Stratigraphy comments: "Middle Wenlockian in Tennessee, the equivalent unit, the Waldron Member, Wayne Formation, is in the upper Kockelella amsdeni Zone of Barrick and Klapper (1976);
Lithology and environment
Primary lithology: argillaceous,silty wackestone
Includes fossils?Y
Lithology description: "The common lithology is a sparesely fossiliferous muddy to silty wackestone with less than 10% skeletal debris. Occasionally debris stringers may have up to 20% skeletal debris, mostly echinoderms."
Environment:deep subtidal shelf Tectonic setting:cratonic basin
Geology comments: "Echinoderms usually dissociated...bedding often indistinct due to burrowing and reworking...brachiopods usually articulated...organic matter and pyrite common...graptolites rare here...most skeletal grains show some wear or dissolution...most likely BA 4 to inn BA 5, inhabiting somewhat restricted water not often disturbed either by waves or currents. Feldman (1989) considered this microcrinoid dominated assemblage to be slightly dysaerobic and below storm wave base; he regarded it as the deepest Waldron Shale biofacies."
2003.04.06: Environmenal call by S. Peters based on field experience with unit
Taphonomy
Collection methods and comments
Reason for describing collection:paleoecologic analysis
Metadata
Database number:26858
Authorizer:M. Foote Enterer:M. Foote
Modifier:S. Peters Research group:marine invertebrate
Created:2002-11-06 06:55:11 Last modified:2003-04-06 12:36:07
Access level:the public Released:2002-11-06 06:55:11
Creative Commons license:CC BY
Reference information

Primary reference:
4379. T. J. Frest, C. E. Brett, and B. J. Witzke. 1999. Caradocian-Gedinnian echinoderm associations of Central and Eastern North America. Paleocommunities--a case study from the Silurian and Lower Devonian 638-783 [M. Foote/K. Koverman/P. Wagner]